Bottle cap



FIG. 1 is a front elevational view of a bottle cap showing our new design, environmental structure associated therewith being shown for illustrative purposes in dotted outline and forming no part of the claimed design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a side elevational view thereof, the opposite side elevational view being a mirror image thereof; and,

FIG. 4 is a top plan view thereof, FIGS. 2, 3, and 4 being shown on an enlarged scale. 

The ornamental design for a bottle cap, as shown and described. 